I am looking to build an outbuilding to expand my "floorium" but have a few questions for the experts as to how to do so without giving up the big advantages of climate/humidity control and bug control if you build an outbuilding. I am younger than the Baby Boomers and thus have had to move every time I wanted to better myself in my career (several times) and thus have had shops in basements and outbuildings. The basement shops have the advantage of if well built, having vapor barrier in the floor, insulation, and climate control with the house A/C to make the experience of working pleasant but cramped, and the outbuildings have been cheap steel buildings with no humidity control, vapor barriers, or cooling beyond a fan that I brought. I like the space of the outbuildings but like the climate control and lack of mildew/mold/bugs that a basement shop provides.
My question is there any way to keep an outbuilding adequately dehumidifed and sealed that you can reasonably keep a shop in it? I already anticipate on putting in vapor barrier around the entire structure including under the slab, but in every garage I've been in bugs have crawled in/around/under the roll-up doors. Any way to keep them out?